• We will generate a random shard id when creating a cluster node, so auxFieldHandlers[af_shard_id].isPresent(n) == 0 never meet, so it means we never add master nodes into cluster.shards when loading, this bug is introduced in Introduce Shard IDs to logically group nodes in cluster mode #10536 that supports shard-id concept. BTW, Avoid cluster.nodes load corruption due to shard-id generation #13468 can make replicas add into cluster.shards

• Replica shard_id may be different with master, so before we add again, we should remove it, otherwise, cluster.shards will have dirty shards, introduced in Avoid cluster.nodes load corruption due to shard-id generation #13468

These bugs causes the output of the cluster shards is corrupt, the temporary slot_info may not be cleaned up, we may see the duplicated slot ranges, and a shard info without master.

test locally, maybe we need add tcl test cases later